Spray gun



Nov. 8, 1955 G. v. COVINGTON SPRAY GUN Filed April, 17, 1955 Gary V. Co vingon INVENToR. @hm

.BY Emy,

United States Patent O SPRAY GUN Gary V. Covington, Tucson, Ariz.

Application April 17, 1953, Serial No. 349,426

1 Claim. (Cl. 299-92) This invention relates to new and useful improvements and structural refinements in spray guns, particularly spray guns for liquids such as paint, varnish, water, drugs, insecticide, etc., and the principal object of the invention is to provide a spray gun of a character herein described which may be conveniently and effectively employed in homes, hospitals, sick rooms, or relatively small work shops by connecting the same to a source of water under pressure, thus eliminating the use of compressed air.

Some of the advantages of the invention reside in its simplicity of construction, in its efficient operation and in its adaptability to economical manufacture.

With the above more important objects and features in view, and such other objects and features as may become apparent as this specification proceeds, the invention consists essentially of the arrangement and construction of parts as illustrated in the accompanying drawings, in which:

Figure 1 is an elevational view of the invention, the same being shown partly in section so as to reveal its construction; and

Figure 2 is a top plan view thereof.

Like characters of reference are employed to designate like parts in the specification and throughout the several views.

Referring now to the accompanying drawings in detail, the spray gun is designated generally by the reference character and embodies in its construction a suitable container 12 for material which is to be sprayed, such material being indicated at 14.

The container 12 is provided with a removable cover 16 and a conventional dispensing nozzle 18 is mounted on this cover, as shown.

The nozzle 18 communicates with an extension tube 20 which extends downwardly from the cover 16 into the container 12 and the nozzle 18 also includes a suitable valve mechanism 22 so that the rate of discharge of material through the nozzle may be effectively controlled or stopped.

A handle 24, the same being hollow, is formed integrally with the cover 16 and has a downwardly angulated portion provided with a hand grip 26, the handle affording therein a passage or conduit 28 which is adapted to be connected to a source of water under pressure, such as for example, a garden hose 30.

The handle 24 has pivotally mounted thereon a lever 32, one arm of which is operatively connected by a link 34 to the valve 22, while the other arm of the lever 32 2,723,161 Patented Nov. 8, 1955 is operatively connected to an actuating finger piece 34 disposed adjacent the hand grip 26. It will be apparent that in this manner, the operation of the valve 22 may be effectively controlled by the same hand which holds the hand grip 26.

The finger piece 34 is slidably guided by a bracket 38 secured to the handle 24, as will be readily understood.

A hollow depending shank or stem 40 is provided on the underside of the cover 16 and is formed at its lower end with an enlarged head 42, the latter being receivable in the upper end of an expansible bulb 44. This bulb is disposed within the container 12 and a spring pressed clamping ring or member 46 is slidable on the shank or stem 40 so as to sustain the bulb 44 in position on the head 42. The spring for pressing the member 46 against the bulb 44 is illustrated at 48.

When the invention is placed in use, water under pressure is admitted through the passage 28 into the expansible bulb 44 and as the bulb expands as illustrated at 50, it will displace the liquid 14 in the container 12 so that such liquid escapes the tube 20 and is dispensed through the nozzle 18 in the form of a spray, effectively `controlled by the manipulation of the finger piece 34.

In order to deliate the bulb 44, a suitable relief valve 52 is provided on the handle 24 in communication with the passage 28, so that after the source of Water is shut ot, the valve 52 may be opened to permit escape of the water from the bulb 44 and passage 28.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claim. l

What is claimed as new is as follows:

A spray gun comprising: a container for the reception of a liquid, a removable cover on said container, a tubular stem depending from the cover in the container, an expansible bulb suspended from said stem and communi eating therewith, a retaining head on the lower end portion of the stem engaged in said bulb, a ring slidable on the stem, a coil spring on the stem yieldingly engaging the ring with the bulb for removably securing same on the stem in conjunction with the head, means on the cover communicating with the stem for injecting a fluid under pressure into the bulb for expanding same for ejeeting the liquid from the container, and a valve controlled discharge nozzle on the cover communicating with the container.

References Cited in the le of this patent UNITED STATES PATENTS 1,743,056 Whitaker Jan. 7, 1930 2,153,240 Dailey et al Apr. 4, 1939 2,513,455 Cornelius July 4, 1950 FOREIGN PATENTS 412,374 Great Britain June 28, 1934 588,631 Germany Aug. 19, 1932 

